Size of system needed (in kW) = yearly energy use (in kWh) / 1,276h

*(where 1,276h equals the annual average equivalent of fullsunlight hours in Alberta)*

So let’s pretend you added up your power bills and determined that you use 10,000kWh over the course of a year, you would then do the above calculation and determine that you need a 7.84kW solar panel system!

10,000kWh / 1,276h = 7.84kW